[article]
| Titre : |
Proteins - innovative bas materials for adhesives and coatings |
| Type de document : |
texte imprimé |
| Auteurs : |
Ralf Quack, Auteur |
| Année de publication : |
2002 |
| Article en page(s) : |
p. 39-44 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Index. décimale : |
667.9 Revêtements et enduits |
| Résumé : |
Proteins exhibit a considerable innovative potential when used as based polymers in formulating adhesives, binders and coatings. The interest in using proteins in these areas has risen fundalentally, especiallyat present. this development is due to various reasons. Protein isolates can be purchased at the world market for prices that are comparable to the prices of synthetic polymers. in particular the residues of processing and extraction occuring in the procduction of plant oils from various oil seeds as soy, rapesseed, sunflower and cottonseed are a source of high-grade protein isolates. Protein isolates from cereals as wheat, corn or rice are available in high amount. Likewise, protein isolates can be produced from legumes such as lupinus and peas.
The structure of a protein, i.e its primary, secondary and tertiary structure, causes the technological properties of a protein and ths defines its potential for technical application. By chemical application e.g by alkylation, acetylation, phosphorisation, estericfication, oxidation or reduction the technological properties of the protein can be vary manifold. The enzymatic modifications of proteins by preteases that selectively cleave the peptide bonds within the amino acid sequence give products with adaptated rheological properties. Besides chemical and enzymatic pmodifications combined physical and chemical methods lead to a significant alteration of protein properties. Denaturising agents such as urea, sodium dodecylesulfate or guanidine-hydrochloride give rise to the unfolding significantly improves the adhesive properties of proteins.
Biotechnological processes combined with the methods of genetics engineering create possibilities for almost tailormade proteins that can be used in technological applications, e.g in adhesives and coatings. Protein sequences and the genes that encode these sequences have been patented within the context of marine adhesives. |
| Note de contenu : |
- INTRODUCTION : Protein adhesives - Chemical modification,
- GRAFTING
- PHYSICAL AND CHIMICAL MODIFICATIONS
- ENZYMATIC MODIFICATIONS
- MARINE ADHESIVES
- WHEAT PROTEINS
- RAPESEED PROTEINS
- CASEINS |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=12376 |
in PAINTINDIA > Vol. LII, N° 7 (07/2002) . - p. 39-44
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